Re: (ITS#5694) Usage of -w with slapadd breaks delta-syncrepl

[quanah@zimbra.com]

--On Tuesday, September 09, 2008 12:19 PM -0700 Howard Chu <hyc@symas.com> 
wrote:

> quanah@zimbra.com wrote:
>> --On Tuesday, September 09, 2008 8:59 PM +0200 Pierangelo Masarati
>> <ando@sys-net.it>  wrote:
>>
>>
>>>> I'll give what you suggested a try, but this is still a serious bug.
>>> There's something I don't clearly get.  As far as I understand, you are
>>> saying that consumers lose sync when the log database is purged before
>>> they have a chance to sync (because they were down).  I don't see how
>>> they could sync, then.  Of course, there should be a means for
>>> slapo-syncprov(5) to tell that, and force a refresh.
>>
>> Because the consumer is supposed to do a full refresh if they find their
>> context CSN doesn't match the contextCSN of the master.
>
> Not quite. More precisely, the provider is supposed to tell the consumer
> that the consumer's cookie is out of date if the cookie is older than
> anything in the provider, and the consumer asked for the reload Hint.
> Otherwise the provider just sees the consumer is stale and returns a full
> dump implicitly.

Well, the consumer's definitely not acting on a full dump in either case. :/

In my latest test, after the purge, I have:

# accesslog
dn: cn=accesslog

contextCSN: 20080909190440.484524Z#000000#000#000000

dn:
contextCSN: 20080909190440.484524Z#000000#000#000000

on the master and

contextCSN: 20080909183254.258851Z#000000#000#000000

on the replica prior to starting it.  SO the replica is clearly behind. 
The new entry on the master is:

dn: uid=qtest7,cn=admins,cn=zimbra
entryCSN: 20080909190440.484524Z#000000#000#000000

which matches the CSN on both the main DB and accesslog DB.

now, staring the replica, we find:

contextCSN: 20080909190440.484524Z#000000#000#000000

So, it believes it has sync'd now, but uid=qtest7 doesn't exist!

--Quanah

--

Quanah Gibson-Mount
Principal Software Engineer
Zimbra, Inc
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